STMicroelectronics · Electronic Components
STM32H503KB
High-performance, Arm Cortex-M33, MCU with 128-Kbyte Flash, 32-Kbyte RAM, 250 MHz CPU
Part NumberSTM32H503KB
ManufacturerSTMicroelectronics
AvailabilityAvailable to order — request a quote
Specifications
SeriesSTM32H5
PackageUFQFPN 32 5x5x0.55 mm
CoreArm Cortex-M33
Frequency Mhz250
Flash Kb128.0
Ram Kb32.0
InterfacesI2C: 2; SPI: 3; I2S: 3; USART: 3; UART: 1; USB: USB FS; CAN-FD: 1; I3C: 2
AnalogADC12: 1 conv / 10 ch; DAC12: 2; Comparators: 1; Op amps: 1
Timers16-bit timers: 6; 32-bit timers: 1; Motor control timers: 1; Other: Dual Watchdog, RTC, SysTick
SecurityCrypto: HMAC, SHA-1, SHA-2, TRNG; Security: Secure Boot, Silicon Device Lifecycle
Supply Voltage1.62–3.6 V
Temp Range-40.0 to 105.0 °C
RH Electronics, Inc. — independent stocking distributor since 1982.
Every shipment inspected on receipt · ISO 9001:2015 · ANSI/ESD S20.20 · ERAI member since 1998 · GIDEP participant
Every shipment inspected on receipt · ISO 9001:2015 · ANSI/ESD S20.20 · ERAI member since 1998 · GIDEP participant
Frequently asked
Is STM32H503KB available?
We can source STM32H503KB even if it isn't in our active stock list. As an independent distributor we reach inventory outside the franchise channel — including hard-to-find and obsolete parts. Send us a quote request.
Is STM32H503KB by STMicroelectronics obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If STM32H503KB has been discontinued, we can often source remaining stock or qualified alternates. Contact us with your quantity and target date.
How does RH Electronics verify parts like STM32H503KB?
Every incoming shipment is inspected under our ISO 9001:2015 quality system — documentation, markings, and construction checked against known-good references. For deeper analysis, we direct work through accredited independent labs. We've been an ERAI member since 1998 and a GIDEP participant.
Can you find a cross-reference or alternate for STM32H503KB?
Yes. Our team reads part numbers the way they were designed — decoding family, speed, temperature grade, package, and reliability level — to identify acceptable alternates when the exact part isn't available. Submit a quote request and we'll advise.